package com.shunbo.convenient.utils;


import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

public class QRCodeUtil {
	  private static final String CHARSET = "utf-8";
	    private static final String FORMAT_NAME = "JPG";
	    // ��ά��ߴ�
	    private static final int QRCODE_SIZE = 300;
	    // LOGO���
	    private static final int WIDTH = 60;
	    // LOGO�߶�
	    private static final int HEIGHT = 60;

	    private static BufferedImage createImage(String content, String imgPath,
	            boolean needCompress) throws Exception {
	        Hashtable hints = new Hashtable();
	        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
	        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
	        hints.put(EncodeHintType.MARGIN, 1);
	        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
	                BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
	        int width = bitMatrix.getWidth();
	        int height = bitMatrix.getHeight();
	        BufferedImage image = new BufferedImage(width, height,
	                BufferedImage.TYPE_INT_RGB);
	        for (int x = 0; x < width; x++) {
	            for (int y = 0; y < height; y++) {
	                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000
	                        : 0xFFFFFFFF);
	            }
	        }
	        if (imgPath == null || "".equals(imgPath)) {
	            return image;
	        }
	        // ����ͼƬ
	        QRCodeUtil.insertImage(image, imgPath, needCompress);
	        return image;
	    }

	   
	    private static void insertImage(BufferedImage source, String imgPath,
	            boolean needCompress) throws Exception {
	        File file = new File(imgPath);
	        if (!file.exists()) {
	            System.err.println(""+imgPath+"   ���ļ������ڣ�");
	            return;
	        }
	        Image src = ImageIO.read(new File(imgPath));
	        int width = src.getWidth(null);
	        int height = src.getHeight(null);
	        if (needCompress) { // ѹ��LOGO
	            if (width > WIDTH) {
	                width = WIDTH;
	            }
	            if (height > HEIGHT) {
	                height = HEIGHT;
	            }
	            Image image = src.getScaledInstance(width, height,
	                    Image.SCALE_SMOOTH);
	            BufferedImage tag = new BufferedImage(width, height,
	                    BufferedImage.TYPE_INT_RGB);
	            Graphics g = tag.getGraphics();
	            g.drawImage(image, 0, 0, null); // ������С���ͼ
	            g.dispose();
	            src = image;
	        }
	        // ����LOGO
	        Graphics2D graph = source.createGraphics();
	        int x = (QRCODE_SIZE - width) / 2;
	        int y = (QRCODE_SIZE - height) / 2;
	        graph.drawImage(src, x, y, width, height, null);
	        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
	        graph.setStroke(new BasicStroke(3f));
	        graph.draw(shape);
	        graph.dispose();
	    }

	   
	    public static String encode(String content, String imgPath, String destPath,
	            boolean needCompress) throws Exception {
	        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
	                needCompress);
	        mkdirs(destPath);
	        String file = new Random().nextInt(99999999)+".jpg";
	        ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
	        return "/image/"+file;
	    }

	   
	    public static void mkdirs(String destPath) {
	        File file =new File(destPath);   
	        //���ļ��в�����ʱ��mkdirs���Զ��������Ŀ¼��������mkdir��(mkdir�����Ŀ¼����������׳��쳣)
	        if (!file.exists() && !file.isDirectory()) {
	            file.mkdirs();
	        }
	    }

	   
	    public static void encode(String content, String imgPath, String destPath)
	            throws Exception {
	        QRCodeUtil.encode(content, imgPath, destPath, false);
	    }

	   
	    public static String encode(String content, String destPath,
	            boolean needCompress) throws Exception {
	       return QRCodeUtil.encode(content, null, destPath, needCompress);
	    }

	   
	    public static void encode(String content, String destPath) throws Exception {
	        QRCodeUtil.encode(content, null, destPath, false);
	    }

	   
	    public static void encode(String content, String imgPath,
	            OutputStream output, boolean needCompress) throws Exception {
	        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
	                needCompress);
	        ImageIO.write(image, FORMAT_NAME, output);
	    }

	   
	    public static void encode(String content, OutputStream output)
	            throws Exception {
	        QRCodeUtil.encode(content, null, output, false);
	    }

	   
	    public static String decode(File file) throws Exception {
	        BufferedImage image;
	        image = ImageIO.read(file);
	        if (image == null) {
	            return null;
	        }
	        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(
	                image);
	        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
	        Result result;
	        Hashtable hints = new Hashtable();
	        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
	        result = new MultiFormatReader().decode(bitmap, hints);
	        String resultStr = result.getText();
	        return resultStr;
	    }

	   
	    public static String decode(String path) throws Exception {
	        return QRCodeUtil.decode(new File(path));
	    }
	   
	   
	    public static void main(String[] args) throws Exception {
	        String text = "http://www.baidu.com";
			String encode = QRCodeUtil.encode("http://www.baidu.com", "/Users/weizhuang/", true);
			System.out.println(encode);
		}
}
